Darwin3 31+16+3 model code, datafiles and parameters

MITgcm code (available trhough http://mitgcm.org), with Darwin ecosystem code (available at https://github.com/darwinproject/darwin3). Exact version, modifications (see dar6/code_31+16+3) and input datafiles (see dar6/run33_5) are in the tarball available here. Model parameters are listed in darwin_params.txt and darwin_traits.txt. Equations are provided at: https://darwin3.readthedocs.io/en/latest/phys_pkgs/darwin.html麻省理工学院通用环流模型（MITgcm）代码可通过http://mitgcm.org获取，配套的Darwin生态系统代码可从https://github.com/darwinproject/darwin3获取。其精确版本、修改细节（详见dar6/code_31+16+3）与输入数据文件（详见dar6/run33_5）均包含于本次提供的tar压缩包中。模型参数已在darwin_params.txt与darwin_traits.txt文件中列明。相关控制方程的说明文档可通过以下链接查阅：https://darwin3.readthedocs.io/en/latest/phys_pkgs/darwin.html